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Finding the Fourth Proportional to 515.77, 773.54 and 307.60

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Solution

The fourth proportional to 515.77, 773.54 and 307.60 is: 461.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.77 : 773.54 = 307.60 : x
  2. Step 2: Convert to fraction form
    515.77/773.54 = 307.60/x
  3. Step 3: Cross multiply
    515.77x = 773.54 × 307.60
  4. Step 4: Simplify right side
    515.77x = 237,937.62
  5. Step 5: Solve for x
    x = 237,937.62/515.77
  6. Step 6: Final answer
    x = 461.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.